diff --git a/docs/source/index.rst b/docs/source/index.rst
index fd11ffe2c..bd8b395f5 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -83,6 +83,7 @@ Code example
 Here is a hello world program::
 
     %import textio
+    %zeropage basicsafe
 
     main {
         sub start() {